Final answer:
The correct sentence with proper comma usage is Option B ('For better or for worse, we were committed to the task.'). It adheres to the rules of comma placement around nonessential phrases and does not have incorrectly placed commas.
Step-by-step explanation:
The subject in question deals with comma usage within English sentences, specifically how to punctuate them correctly. When punctuating sentences with commas, it is important to understand the use of coordinating conjunctions and the separation of independent clauses.
Using coordinating conjunctions, such as 'for,' 'and,' 'nor,' 'but,' 'or,' 'yet,' and 'so' (remembered easily by the acronym FANBOYS), requires a comma before the conjunction when joining two main clauses. Moreover, introductory phrases usually need a comma separating them from the main clause, especially if they are longer than four words.
With those rules in mind, let's analyze the options provided. Option A ('For, better or for worse, we were committed to the task.') incorrectly places a comma after 'For.' Option C ('For, better or for, worse we were committed to the task.') also inaccurately inserts commas both after 'For' and 'or.' Option D ('For better of for worse we were committed to the task.') contains a typo ('of' instead of 'or') and lacks the necessary comma after 'worse.'
Therefore, Option B ('For better or for worse, we were committed to the task.') is punctuated correctly, following the rules for using commas in English grammar, particularly around a nonessential phrase like 'better or for worse.' It should be noted that 'of' in options A and D is a typo, and the correct word should be 'or,' but since we are focusing on commas, this does not affect the correctness of the punctuation.